Within an environmental education project, the secondary school in Morano Calabro, a small town in southern Italy, decided to find a technological solution by constructing stands for the annual traditional school market by using recycled materials. The material they concentrated on was laminated cardboard from envelopes for milk or juice. The design idea was to build a double curved shell that would be stable enough to cover the required space without using other materials. The adaptation of the chosen material was quite easy. Using lightweight structures has double benefits. Using less material to resolve a spatial task is per se an environmental improvement as less embedded energy is spent for the realization of the building. Furthermore, lightweight structures can be lifted or manipulated more easily by a less persons without difficult apparatus.